I'd love to know if anyone has suggestions/thoughts on what they'd like to see in this book; the TOC is pretty comprehensive I feel, but would love to know what else people would be looking for! :)

I'd love to see solid composition examples... I mean there's plenty of work for beginning react on state, and their event models. But actually covering some of the composition examples in order to keep components more functional at the lower levels would be great.

Of course Redux and maybe MobX is probably a given.